There is good news ahead for herpes patients, who usually suffer through a week of treatment before their pain and symptoms are resolved.

The FDA has recently approved Famvir as a one-day treatment option for patients with genital herpes, the first of its kind. Used properly, under the new FDA dosing regimen guidelines, Famvir can be used to prevent herpes outbreaks or curtail them as they occur.

This is a huge step in treatment for a virus that affects 45 million people in the U.S. and whose...